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06:58
High-Throughput Assays of Critical Thermal Limits in Insects
Published on: June 15, 2020
CRITICAL THERMAL INCREMENTS FOR RHYTHMIC RESPIRATORY MOVEMENTS OF INSECTS.
1Zoological Laboratory, Rutgers University, New Brunswick, and the Carnegie Institution of Washington.
The Journal of General Physiology
|October 30, 2009
Summary
Insect respiration has distinct temperature characteristics, differing from neuromuscular activities. Decapitation alters these characteristics, suggesting neurone control over respiratory rhythm.
Area of Science:
- Zoology
- Insect Physiology
- Biophysics
Background:
- Insect abdominal respiratory movements exhibit rhythmic patterns.
- Temperature characteristics are used to analyze biological processes.
- Distinguishing respiratory from non-respiratory rhythms is crucial for functional analysis.
Purpose of the Study:
- To determine the specific temperature characteristics of insect abdominal respiratory movements.
- To differentiate these characteristics from those of neuromuscular activities.
- To investigate the effect of physiological changes, like decapitation, on respiratory rhythm temperature characteristics.
Main Methods:
- Measurement of critical temperature increments for abdominal respiratory rhythms in various insect species (Libellula, Dixippus, Anax, Melanoplus).
- Comparison of temperature characteristics between respiratory and non-respiratory rhythmic activities.
- Analysis of changes in temperature characteristics following decapitation in Melanoplus.
Main Results:
- Insect respiration critical increments were found to be 11,500+/- or 16,500+/- calories, distinct from 12,200 calories for non-respiratory neuromuscular activities.
- In Melanoplus grasshoppers, the critical increment was 7,900 calories, correlating with gaseous exchange.
- Decapitation in Melanoplus altered abdominal rhythm temperature characteristics to 16,500 and then 11,300 calories over time.
Conclusions:
- Insect respiratory rhythms are governed by specific temperature characteristics that differ from other rhythmic activities.
- Decapitation influences the temperature characteristics of abdominal rhythm, indicating neural control.
- These findings provide a basis for the functional analysis of vital processes using temperature characteristics.
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